When clicking, it shows a render test and in it appearsĮdit: Man, I dont know if helps much, because testing ths VGA in the second slot (that is known for being 8x) the readings from GPU-z are THE same (16x and 16x). If you click the button bellow, a small render test will be started which should put the card in its highest power state, so you can verify proper PCI-E speedes. This is why you might see undesired values in GPU-Z Bus width readout. Improved overclockability, black design (including a black colored BIOS). One of these functions reduces the PCI-E link speed & width to lower levels to conserve power when the card is idle.

User guide (196 pages) Motherboard Asus RAMPAGE III BLACK EDITION User Manual. Intel x79 express chipset (174 pages) Motherboard Asus Rampage II Extreme - Republic of Gamers Motherboard User Manual. 'Modern graphic cards come with extensive power saving features. Motherboard Asus Rampage IV Formula User Manual.

This PCI-E is the 1st slot, nearest from the CPU. The screens are the 1st GPU and 2nd GPU of the 590gtx in the same PCI-E that BIOS shows as 8x (wrong) instead of 16x (that should be the right).

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